Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f3ec6dd32a440ed…

MALICIOUS

PDF

40.3 KB Created: 2020-08-15 07:27:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68176c7c3d1c4e135a31c3bde6bb71c9 SHA-1: 12b89773e96fc5a320de3467a88ffbcd30ce18c3 SHA-256: 8f3ec6dd32a440ed390485d4a5d9b062cf6a3cfc20b90edde704cb813e776695
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The document body text, though heavily obfuscated, includes the string "6th grade math review test pdf" and a URL pointing to the malicious redirector. This suggests the document is designed to trick users into clicking the link, likely leading to a phishing or malware download site. No scripts were extracted, limiting the analysis of specific execution behaviors.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=6th+grade+math+review+test+pdf
    • http://files.legalformsbc.ca/uploads/1/3/1/4/131438348/ruxofi_savurekabiju_xiderenute_vigomu.pdf
    • http://files.artbymichellemartin.com/uploads/1/3/0/7/130739015/zodajumuno.pdf
    • http://files.lifestylerant.com/uploads/1/3/1/4/131437131/ebcb9f13.pdf
    • http://wodikux.windowwarehousedraperysupply.com/uploads/1/3/1/3/131398091/5fa3e1fe2.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/compound_sentences_worksheet_for_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/gujijoliwido.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/43353103844.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/16919185351.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/66764804939.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/kejejaseka.pdf
    • https://cdn.shopify.com/s/files/1/0447/7632/5286/files/brown_sequard_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0429/7503/5541/files/50757574494.pdf
    • https://cdn.shopify.com/s/files/1/0434/1792/7837/files/zuvisopotuduv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6124/files/oxford_advanced_learner_dictionary_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/905758252.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e75.bin
ec5b01fef33d1a35eecb4ac1a7d0cf9b27170ff9a73540065018defe19c43647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5632 bytes
font_01_sfnt_off00007190.bin
3a4e44b33721ecf245483989fabfb44c68ccd0c4e33ab35a83e2216fc3b7421d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 10216 bytes

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